Support bucket versioning (#9377)

- Implement a new xl.json 2.0.0 format to support,
  this moves the entire marshaling logic to POSIX
  layer, top layer always consumes a common FileInfo
  construct which simplifies the metadata reads.
- Implement list object versions
- Migrate to siphash from crchash for new deployments
  for object placements.

Fixes #2111

cmd/consolelogger.go

@@ -45,7 +45,7 @@ func mustGetNodeName(endpointZones EndpointZones) (nodeName string) {
 	if err != nil {
 		logger.FatalIf(err, "Unable to start console logging subsystem")
 	}
-	if globalIsDistXL {
+	if globalIsDistErasure {
 		nodeName = host.Name
 	}
 	return nodeName